code: def test_max(dtype, nelem):
      dtype = cudf.dtype(dtype).type
      data = gen_rand(dtype, nelem)
      sr = Series(data)
  
      got = sr.max()
      expect = dtype(data.max())
  
      assert expect == got
  
imports: from decimal import Decimal
  from itertools import product
  import numpy
  import pandas
  import pytest
  import cudf
  from cudf import Series
  from cudf.core.dtypes import Decimal32Dtype, Decimal64Dtype, Decimal128Dtype
  from cudf.testing import _utils
  from cudf.testing._utils import NUMERIC_TYPES, assert_eq, expect_warning_if, gen_rand
label_desc: Use image node_id 10 for calling a global function with example usage: test_max(dtype, nelem) without return types